Asia Cut $281 Billion of Treasuries Since February — and the Long End Cleared at 5.73% Anyway

Treasury's release of August international capital data put the total net inflow at $199.8 billion, of which $178.5 billion came from private investors and $21.3 billion from official institutions. Read the same measure a year earlier and the direction reverses: official institutions ran net outflows of $37.9 billion in August 2025 and $23.7 billion in September 2025. On the flow measure, official buying improved year over year, not fell by 60%. The retreat is real, but it lives in holdings and in Asia's mix of buyers — not in the aggregate official purchase line.

The August data and the monthly major-holders table tell two halves of the same story. Foreign holdings rose in August from their lowest level since October 2025, led by Canada and Belgium — custody centres for private money — while Japan's own holdings dropped $36 billion to $1.1 trillion, the lowest since December 2024. China, at $590.7 billion, sits below the 18-year low reported in May. Japan, China and South Korea now hold $1,793 billion between them, down $281 billion from February and $226 billion from a year ago.

Here is the mechanism the flow data reveal. Money market funds added 24% to their Treasury holdings over the two years to early 2026 and now hold $3.23 trillion, 12% of the market, while foreign holdings grew 0% and the Federal Reserve's own book shrank 18%. The buyers of duration are shrinking; the buyers of cash are expanding. A cash buyer can absorb bills. It cannot absorb a 30-year bond, which is precisely why the long end has to be repriced rather than funded.

The levered complex is where the marginal duration bid lives. Bloomberg reported that the total notional of leveraged investors' Treasury basis trades fell to around $900 billion from $1.26 trillion at the start of the year, while Morgan Stanley estimated leveraged basis holdings down 20% this year to $1.2 trillion. The unwind has been concentrated in 2-year and 5-year futures: hedge funds' net shorts in 2-year futures are down more than 40% from a 15-month high in March, and asset managers' net longs are down more than 30% from an all-time high. That is a repricing of carry, not a funding crisis — Morgan Stanley sees no broad stress.

Treasury has leaned into its own balance sheet. On August 19 it said it would at least double the maximum size of long-end liquidity-support buybacks, from $2 billion to at least $4 billion per operation, effective September 9 and running through the November 4 refunding. The first operation under the raised cap was a $6 billion purchase of 10-to-20-year securities — triple the previous long-dated level. Yields rose on the announcement. The buyback addresses off-the-run liquidity in the belly of the curve; it does not touch the 30-year, and at that scale it cannot change who is willing to hold duration.

Japan's retreat is a repricing rather than a diplomatic turn. Japanese investors sold about ¥3 trillion of overseas debt this year as the 10-year JGB yield crossed 3%, and with dollar hedging costs near 3%, a hedged 10-year Treasury yields only about 2% in yen terms — roughly a percentage point less than comparable JGBs. There is no yield left to capture. The July 2026 Treasury foreign exchange report still showed Japan reporting a ¥1 trillion increase in foreign holdings from 2024 to 2025, so the exit is a 2026 phenomenon, not a decade-long retreat. Reuters also reported coordinated yen intervention involving sales of foreign securities, which is a mechanism for converting Treasury holdings into dollars at the margin.

The demand gap shows up in specific lines of specific balance sheets. The money-market and ETF complex collects fees on a cash market that is the only part of Treasuries still growing; insurers and pension books are the only buyers of duration with room to grow; stablecoin issuers earn on a bill book that is not compounding; and Japanese banks carry dollar assets into a repatriation wave. Here is what the reported numbers say.

Two conclusions follow. First, the cash complex is the winner of this regime: money funds, ETFs and stablecoin reserves are growing while duration buyers shrink, so fee income is migrating to the short end and to the intermediaries of it. Second, the losers are anyone whose balance sheet was built to absorb duration at 4% yields — and, in a market where auctions still clear, that pain shows up as mark-to-market and slower deployment rather than as failed sales. The one group with a genuinely offsetting position is insurers and retirement savers, whose new money reprices upward every time the 30-year sells off.